HD 203387 and Its Two Known Planets

HD 203387 is a star 201 light-years away with two known planets, both discovered in 2022 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. The star has a radius of 10.6 solar radii, larger than the Sun's, and a temperature of 5170 K, cooler than the Sun's.

HD 203387 b has a minimum mass of 1110 Earth masses, a lower bound on its true mass and roughly 3.48 times Jupiter's mass, larger than Earth's. It orbits once every 513 days, the shortest year among the listed planets.

HD 203387 c has a mass of 2380 Earth masses, roughly 7.49 times Jupiter's mass and larger than Earth's. Its orbital period is 2480 days, the longest year among the listed planets.